\documentclass{article}
\usepackage{ctex}
\usepackage{booktabs} % 导入三线表需要的宏包
\usepackage{longtable}% 导入跨页表格所需宏包
\usepackage{graphics}
\usepackage{multirow}
\begin{document}

\begin{table}[!ht]
    \center
    \begin{tabular}{|c|c|c|c|}\hline
    \multicolumn{1}{|c|}{\multirow{2}{*}{aaaa}} & \multicolumn{3}{c|}{bbbb}\\ \cline{2-4}
     & cccc  & dddd & eeee \\ \hline
    \multirow{2}{*}{aaaa}& 50 & 86 & 122  \\ \cline{2-4}
    \multirow{2}{*}{ }& 5 & 78  & 107   \\ \hline
     3& 25 & 48  & 101  \\ \hline
     4& 28 & 60 & 106  \\ \hline
    \end{tabular}
    
    \end{table}
    
    \end{document}